The present study focuses on the formulation and evaluation of a herbal oral gel containing Manilkara zapota leaf extract for the treatment of mouth ulcers. Oral gels are semi-solid preparations that ensure prolonged retention at the application site and enhance therapeutic efficacy. M. zapota leaves are known to possess anti-inflammatory, antioxidant, analgesic, and wound-healing properties due to their rich phytoconstituents such as oleanolic acid, saponins, flavonoids, and phenolic compounds. In this study, the leaves were subjected to Soxhlet extraction, and the obtained extract was incorporated into a Carbopol-based gel formulation. The prepared gel was evaluated for colour, odour, consistency, pH, spreadability, viscosity, extrudability, and gel strength. The results indicated that the herbal gel exhibited smooth consistency, acceptable pH (5.6), good spreadability, high viscosity, and satisfactory extrudability, making it suitable for oral application. The formulation demonstrated good physical stability and favourable pharmaceutical properties. Overall, the study concludes that Manilkara zapota leaf extract can be effectively utilized in an oral gel formulation for managing mouth ulcers, offering a safe, economical, and natural alternative to conventional synthetic treatments.